How do I get Cura to turn my fan/D9 on while preheating?

I am using a MakerFarm Prusa i3. With an arduino 2560 and RAMPS 1.4. I recently moved my fan from the always on pin (12V AUX) on the RAMPS to D9. I changed my motherboard from 34 to 33 in configuration.h (in Marlin 1.0.0).

I can successfully turn on and off the fan in Pronterface using M106 and M107 commands. When I preheat using my printer's console, the fan turns on to speed 255.

Problem: When Cura or Pronterface is preheating the printer, the fan will not turn on, causing the printer to overshoot temperature and give me a MAXTEMP error. The "cool" settings in the expert/advanced settings are set to min fan of 50% and a max of 100%.

How do I get Cura or Pronterface to turn my fan on while preheating?

If you're hitting maxtemp without the fan, then there is as more basic problem. The D9-controlled fan is not meant to regulate the hot end temperature(nor is the "always on" fan) - it is meant to cool the printed object. Hot end temperature is regulated via a thermistor.

If you really want to turn the fan on during pre-heat, you can add the necessary G Code command into your start G code. But I would not advise it - you should be addressing the actual problem instead of its symptoms.